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jlfernan
Joined: 10 Jun 2006
Posts: 51
Location: MIAMI
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 Posted: Thu May 10, 2007 6:36 pm Post subject: Match Drilling QB Skins? |
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A short while ago I match drilled the middle top skin to my QB 9A fuse. The holes in the fuselage were already drilled out to #40 and dimpled by the fellas from the Phillipines. I noticed after I was done that some of the holes in the fuse were slightly enlarged. I'm theorizing that because the flat skin is sitting over a dimple, and we all have noticed that dimpling a hole makes it even larger, the drill bit may not be going straight thru. My question is, since all the parts are precisely prepunched, do you really need to match drill or can you just drill the skin to the correct size and then dimple it? Can I/should I drill the skin without clecoing it the fuse. Another reason for asking is that the skin got damaged in storage and I had to order another one. Now I fear enlarging the holes even more if I match drill again. I've emailed Vans twice earlier this week but have not heard anything.
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_________________
Jorge Fernandez
Supersport
Fuselage/Forward Controls
http://websites.expercraft.com/jlfernan/ |
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lifeofreiley2003(at)yahoo
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| Posted: Thu May 10, 2007 7:20 pm Post subject: Match Drilling QB Skins? |
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Jorge,
The only holes that seemed to have some alignment
issues when I drilled my middle top skin were the
holes where the skin overlapped the side skins. This
would be the dimpled QB skins. Now since you've got
the j-stringers drilled, I would final size the holes
on the new skin and see how it fits clecoed on.
Darrell
--- jlfernan <jlfernan(at)bellsouth.net> wrote:
| Quote: |
<jlfernan(at)bellsouth.net>
A short while ago I match drilled the middle top
skin to my QB 9A fuse. The holes in the fuselage
were already drilled out to #40 and dimpled by the
fellas from the Phillipines. I noticed after I was
done that some of the holes in the fuse were
slightly enlarged. I'm theorizing that because the
flat skin is sitting over a dimple, and we all have
noticed that dimpling a hole makes it even larger,
the drill bit may not be going straight thru. My
question is, since all the parts are precisely
prepunched, do you really need to match drill or can
you just drill the skin to the correct size and then
dimple it? Can I/should I drill the skin without
clecoing it the fuse. Another reason for asking is
that the skin got damaged in storage and I had to
order another one. Now I fear enlarging the holes
even more if I match drill again. I've emailed Vans
twice earlier this week but have not heard anything.
--------
Jorge Fernandez
N214JL Reserved
9A QB
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